<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .yuanxing {
            width: 150px;
            height: 150px;
            background-color: pink;
            margin: 100px auto;
            /* display: inline-block; */
            border-radius: 30%;
        }

        .radius {
            width: 400px;
            height: 200px;
            border-radius: 10px 20px 30px 40px;
            background-color: pink;
        }
    </style>
    </style>
</head>

<body>
    <div>
        <div class="yuanxing"></div>
        <div class="juxing"></div>
        <div class="radius"></div>

    </div>
</body>

</html>